/*
* "$Id$"
*
- * SNMP functions for the Common UNIX Printing System (CUPS).
+ * SNMP functions for CUPS.
*
- * Copyright 2007-2008 by Apple Inc.
- * Copyright 2006-2007 by Easy Software Products, all rights reserved.
+ * Copyright 2007-2013 by Apple Inc.
+ * Copyright 2006-2007 by Easy Software Products, all rights reserved.
*
- * These coded instructions, statements, and computer programs are the
- * property of Apple Inc. and are protected by Federal copyright
- * law. Distribution and use rights are outlined in the file "LICENSE.txt"
- * "LICENSE" which should have been included with this file. If this
- * file is missing or damaged, see the license at "http://www.cups.org/".
+ * These coded instructions, statements, and computer programs are the
+ * property of Apple Inc. and are protected by Federal copyright
+ * law. Distribution and use rights are outlined in the file "LICENSE.txt"
+ * "LICENSE" which should have been included with this file. If this
+ * file is missing or damaged, see the license at "http://www.cups.org/".
*
- * This file is subject to the Apple OS-Developed Software exception.
- *
- * Contents:
- *
- * cupsSNMPClose() - Close a SNMP socket.
- * cupsSNMPCopyOID() - Copy an OID.
- * cupsSNMPIsOID() - Test whether a SNMP response contains the
- * specified OID.
- * cupsSNMPIsOIDPrefixed() - Test whether a SNMP response uses the specified
- * OID prefix.
- * cupsSNMPOpen() - Open a SNMP socket.
- * cupsSNMPRead() - Read and parse a SNMP response...
- * cupsSNMPSetDebug() - Enable/disable debug logging to stderr.
- * cupsSNMPWrite() - Send an SNMP query packet.
- * asn1_decode_snmp() - Decode a SNMP packet.
- * asn1_debug() - Decode an ASN1-encoded message.
- * asn1_encode_snmp() - Encode a SNMP packet.
- * asn1_get_integer() - Get an integer value.
- * asn1_get_length() - Get a value length.
- * asn1_get_oid() - Get an OID value.
- * asn1_get_packed() - Get a packed integer value.
- * asn1_get_string() - Get a string value.
- * asn1_get_type() - Get a value type.
- * asn1_set_integer() - Set an integer value.
- * asn1_set_length() - Set a value length.
- * asn1_set_oid() - Set an OID value.
- * asn1_set_packed() - Set a packed integer value.
- * asn1_size_integer() - Figure out the number of bytes needed for an
- * integer value.
- * asn1_size_length() - Figure out the number of bytes needed for a
- * length value.
- * asn1_size_oid() - Figure out the numebr of bytes needed for an OID
- * value.
- * asn1_size_packed() - Figure out the number of bytes needed for a
- * packed integer value.
- * snmp_set_error() - Set the localized error for a packet.
+ * This file is subject to the Apple OS-Developed Software exception.
*/
/*
* Include necessary headers.
*/
-#include "globals.h"
-#include "snmp.h"
-#include <errno.h>
+#include "cups-private.h"
+#include "snmp-private.h"
#ifdef HAVE_POLL
-# include <sys/poll.h>
+# include <poll.h>
#endif /* HAVE_POLL */
* Local functions...
*/
-static int asn1_decode_snmp(unsigned char *buffer, size_t len,
- cups_snmp_t *packet);
static void asn1_debug(const char *prefix, unsigned char *buffer,
size_t len, int indent);
+static int asn1_decode_snmp(unsigned char *buffer, size_t len,
+ cups_snmp_t *packet);
static int asn1_encode_snmp(unsigned char *buffer, size_t len,
cups_snmp_t *packet);
static int asn1_get_integer(unsigned char **buffer,
unsigned char *bufend,
int length, char *string,
int strsize);
-static int asn1_get_length(unsigned char **buffer,
+static unsigned asn1_get_length(unsigned char **buffer,
unsigned char *bufend);
static int asn1_get_type(unsigned char **buffer,
unsigned char *bufend);
static void asn1_set_integer(unsigned char **buffer,
int integer);
static void asn1_set_length(unsigned char **buffer,
- int length);
+ unsigned length);
static void asn1_set_oid(unsigned char **buffer,
const int *oid);
static void asn1_set_packed(unsigned char **buffer,
/*
- * 'cupsSNMPClose()' - Close a SNMP socket.
- *
- * @since CUPS 1.4@
+ * '_cupsSNMPClose()' - Close a SNMP socket.
*/
void
-cupsSNMPClose(int fd) /* I - SNMP socket file descriptor */
+_cupsSNMPClose(int fd) /* I - SNMP socket file descriptor */
{
-#ifdef WIN32
- closesocket(fd);
-#else
- close(fd);
-#endif /* WIN32 */
+ DEBUG_printf(("4_cupsSNMPClose(fd=%d)", fd));
+
+ httpAddrClose(NULL, fd);
}
/*
- * 'cupsSNMPCopyOID()' - Copy an OID.
+ * '_cupsSNMPCopyOID()' - Copy an OID.
+ *
+ * The array pointed to by "src" is terminated by the value -1.
*/
int * /* O - New OID */
-cupsSNMPCopyOID(int *dst, /* I - Destination OID */
- const int *src, /* I - Source OID */
- int dstsize) /* I - Number of integers in dst */
+_cupsSNMPCopyOID(int *dst, /* I - Destination OID */
+ const int *src, /* I - Source OID */
+ int dstsize) /* I - Number of integers in dst */
{
int i; /* Looping var */
- for (i = 0, dstsize --; src[i] && i < dstsize; i ++)
+ DEBUG_printf(("4_cupsSNMPCopyOID(dst=%p, src=%p, dstsize=%d)", dst, src,
+ dstsize));
+
+ for (i = 0, dstsize --; src[i] >= 0 && i < dstsize; i ++)
dst[i] = src[i];
- dst[i] = 0;
+ dst[i] = -1;
return (dst);
}
/*
- * 'cupsSNMPIsOID()' - Test whether a SNMP response contains the specified OID.
+ * '_cupsSNMPDefaultCommunity()' - Get the default SNMP community name.
*
- * The array pointed to by "oid" is 0-terminated.
+ * The default community name is the first community name found in the
+ * snmp.conf file. If no community name is defined there, "public" is used.
+ */
+
+const char * /* O - Default community name */
+_cupsSNMPDefaultCommunity(void)
+{
+ cups_file_t *fp; /* snmp.conf file */
+ char line[1024], /* Line from file */
+ *value; /* Value from file */
+ int linenum; /* Line number in file */
+ _cups_globals_t *cg = _cupsGlobals(); /* Global data */
+
+
+ DEBUG_puts("4_cupsSNMPDefaultCommunity()");
+
+ if (!cg->snmp_community[0])
+ {
+ strlcpy(cg->snmp_community, "public", sizeof(cg->snmp_community));
+
+ snprintf(line, sizeof(line), "%s/snmp.conf", cg->cups_serverroot);
+ if ((fp = cupsFileOpen(line, "r")) != NULL)
+ {
+ linenum = 0;
+ while (cupsFileGetConf(fp, line, sizeof(line), &value, &linenum))
+ if (!_cups_strcasecmp(line, "Community") && value)
+ {
+ strlcpy(cg->snmp_community, value, sizeof(cg->snmp_community));
+ break;
+ }
+
+ cupsFileClose(fp);
+ }
+ }
+
+ DEBUG_printf(("5_cupsSNMPDefaultCommunity: Returning \"%s\"",
+ cg->snmp_community));
+
+ return (cg->snmp_community);
+}
+
+
+/*
+ * '_cupsSNMPIsOID()' - Test whether a SNMP response contains the specified OID.
*
- * @since CUPS 1.4@
+ * The array pointed to by "oid" is terminated by the value -1.
*/
int /* O - 1 if equal, 0 if not equal */
-cupsSNMPIsOID(cups_snmp_t *packet, /* I - Response packet */
- const int *oid) /* I - OID */
+_cupsSNMPIsOID(cups_snmp_t *packet, /* I - Response packet */
+ const int *oid) /* I - OID */
{
int i; /* Looping var */
* Range check input...
*/
+ DEBUG_printf(("4_cupsSNMPIsOID(packet=%p, oid=%p)", packet, oid));
+
if (!packet || !oid)
+ {
+ DEBUG_puts("5_cupsSNMPIsOID: Returning 0");
+
return (0);
+ }
/*
* Compare OIDs...
*/
- for (i = 0; i < CUPS_SNMP_MAX_OID && oid[i] && packet->object_name[i]; i ++)
+ for (i = 0;
+ i < CUPS_SNMP_MAX_OID && oid[i] >= 0 && packet->object_name[i] >= 0;
+ i ++)
if (oid[i] != packet->object_name[i])
+ {
+ DEBUG_puts("5_cupsSNMPIsOID: Returning 0");
+
return (0);
+ }
+
+ DEBUG_printf(("5_cupsSNMPIsOID: Returning %d",
+ i < CUPS_SNMP_MAX_OID && oid[i] == packet->object_name[i]));
return (i < CUPS_SNMP_MAX_OID && oid[i] == packet->object_name[i]);
}
/*
- * 'cupsSNMPIsOIDPrefixed()' - Test whether a SNMP response uses the specified
- * OID prefix.
- *
- * The array pointed to by "prefix" is 0-terminated.
+ * '_cupsSNMPIsOIDPrefixed()' - Test whether a SNMP response uses the specified
+ * OID prefix.
*
- * @since CUPS 1.4@
+ * The array pointed to by "prefix" is terminated by the value -1.
*/
int /* O - 1 if prefixed, 0 if not prefixed */
-cupsSNMPIsOIDPrefixed(
+_cupsSNMPIsOIDPrefixed(
cups_snmp_t *packet, /* I - Response packet */
const int *prefix) /* I - OID prefix */
{
* Range check input...
*/
+ DEBUG_printf(("4_cupsSNMPIsOIDPrefixed(packet=%p, prefix=%p)", packet,
+ prefix));
+
if (!packet || !prefix)
+ {
+ DEBUG_puts("5_cupsSNMPIsOIDPrefixed: Returning 0");
+
return (0);
+ }
/*
* Compare OIDs...
*/
for (i = 0;
- i < CUPS_SNMP_MAX_OID && prefix[i] && packet->object_name[i];
+ i < CUPS_SNMP_MAX_OID && prefix[i] >= 0 && packet->object_name[i] >= 0;
i ++)
if (prefix[i] != packet->object_name[i])
+ {
+ DEBUG_puts("5_cupsSNMPIsOIDPrefixed: Returning 0");
+
return (0);
+ }
+
+ DEBUG_printf(("5_cupsSNMPIsOIDPrefixed: Returning %d",
+ i < CUPS_SNMP_MAX_OID));
return (i < CUPS_SNMP_MAX_OID);
}
/*
- * 'cupsSNMPOpen()' - Open a SNMP socket.
- *
- * @since CUPS 1.4@
+ * '_cupsSNMPOIDToString()' - Convert an OID to a string.
+ */
+
+
+char * /* O - New string or @code NULL@ on error */
+_cupsSNMPOIDToString(const int *src, /* I - OID */
+ char *dst, /* I - String buffer */
+ size_t dstsize) /* I - Size of string buffer */
+{
+ char *dstptr, /* Pointer into string buffer */
+ *dstend; /* End of string buffer */
+
+
+ DEBUG_printf(("4_cupsSNMPOIDToString(src=%p, dst=%p, dstsize=" CUPS_LLFMT ")",
+ src, dst, CUPS_LLCAST dstsize));
+
+ /*
+ * Range check input...
+ */
+
+ if (!src || !dst || dstsize < 4)
+ return (NULL);
+
+ /*
+ * Loop through the OID array and build a string...
+ */
+
+ for (dstptr = dst, dstend = dstptr + dstsize - 1;
+ *src >= 0 && dstptr < dstend;
+ src ++, dstptr += strlen(dstptr))
+ snprintf(dstptr, dstend - dstptr + 1, ".%d", *src);
+
+ if (*src >= 0)
+ return (NULL);
+ else
+ return (dst);
+}
+
+
+/*
+ * '_cupsSNMPOpen()' - Open a SNMP socket.
*/
int /* O - SNMP socket file descriptor */
-cupsSNMPOpen(void)
+_cupsSNMPOpen(int family) /* I - Address family - @code AF_INET@ or @code AF_INET6@ */
{
int fd; /* SNMP socket file descriptor */
int val; /* Socket option value */
* Create the SNMP socket...
*/
- if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+ DEBUG_printf(("4_cupsSNMPOpen(family=%d)", family));
+
+ if ((fd = socket(family, SOCK_DGRAM, 0)) < 0)
+ {
+ DEBUG_printf(("5_cupsSNMPOpen: Returning -1 (%s)", strerror(errno)));
+
return (-1);
+ }
/*
* Set the "broadcast" flag...
val = 1;
- if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &val, sizeof(val)))
+ if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, CUPS_SOCAST &val, sizeof(val)))
{
+ DEBUG_printf(("5_cupsSNMPOpen: Returning -1 (%s)", strerror(errno)));
+
close(fd);
return (-1);
}
+ DEBUG_printf(("5_cupsSNMPOpen: Returning %d", fd));
+
return (fd);
}
/*
- * 'cupsSNMPRead()' - Read and parse a SNMP response...
+ * '_cupsSNMPRead()' - Read and parse a SNMP response.
*
- * If "timeout" is negative, cupsSNMPRead() will wait for a response
+ * If "timeout" is negative, @code _cupsSNMPRead@ will wait for a response
* indefinitely.
- *
- * @since CUPS 1.4@
*/
-cups_snmp_t * /* O - SNMP packet or NULL if none */
-cupsSNMPRead(int fd, /* I - SNMP socket file descriptor */
- cups_snmp_t *packet, /* I - SNMP packet buffer */
- int msec) /* I - Timeout in milliseconds */
+cups_snmp_t * /* O - SNMP packet or @code NULL@ if none */
+_cupsSNMPRead(int fd, /* I - SNMP socket file descriptor */
+ cups_snmp_t *packet, /* I - SNMP packet buffer */
+ double timeout) /* I - Timeout in seconds */
{
unsigned char buffer[CUPS_SNMP_MAX_PACKET];
/* Data packet */
int bytes; /* Number of bytes received */
socklen_t addrlen; /* Source address length */
+ http_addr_t address; /* Source address */
/*
* Range check input...
*/
+ DEBUG_printf(("4_cupsSNMPRead(fd=%d, packet=%p, timeout=%.1f)", fd, packet,
+ timeout));
+
if (fd < 0 || !packet)
+ {
+ DEBUG_puts("5_cupsSNMPRead: Returning NULL");
+
return (NULL);
+ }
/*
* Optionally wait for a response...
*/
- if (msec >= 0)
+ if (timeout >= 0.0)
{
int ready; /* Data ready on socket? */
#ifdef HAVE_POLL
pfd.fd = fd;
pfd.events = POLLIN;
- while ((ready = poll(&pfd, 1, msec)) < 0 && errno == EINTR);
+ while ((ready = poll(&pfd, 1, (int)(timeout * 1000.0))) < 0 &&
+ (errno == EINTR || errno == EAGAIN));
#else
fd_set input_set; /* select() input set */
- struct timeval timeout; /* select() timeout */
+ struct timeval stimeout; /* select() timeout */
do
{
FD_ZERO(&input_set);
FD_SET(fd, &input_set);
- timeout.tv_sec = msec / 1000;
- timeout.tv_usec = (msec % 1000) * 1000;
+ stimeout.tv_sec = (int)timeout;
+ stimeout.tv_usec = (int)((timeout - stimeout.tv_sec) * 1000000);
- ready = select(fd + 1, &input_set, NULL, NULL, &timeout);
+ ready = select(fd + 1, &input_set, NULL, NULL, &stimeout);
}
# ifdef WIN32
while (ready < 0 && WSAGetLastError() == WSAEINTR);
# else
- while (ready < 0 && errno == EINTR);
+ while (ready < 0 && (errno == EINTR || errno == EAGAIN));
# endif /* WIN32 */
#endif /* HAVE_POLL */
*/
if (ready <= 0)
+ {
+ DEBUG_puts("5_cupsSNMPRead: Returning NULL (timeout)");
+
return (NULL);
+ }
}
/*
* Read the response data...
*/
- addrlen = sizeof(packet->address);
+ addrlen = sizeof(address);
+
+ if ((bytes = recvfrom(fd, buffer, sizeof(buffer), 0, (void *)&address,
+ &addrlen)) < 0)
+ {
+ DEBUG_printf(("5_cupsSNMPRead: Returning NULL (%s)", strerror(errno)));
- if ((bytes = recvfrom(fd, buffer, sizeof(buffer), 0,
- (void *)&(packet->address), &addrlen)) < 0)
return (NULL);
+ }
/*
* Look for the response status code in the SNMP message header...
asn1_decode_snmp(buffer, bytes, packet);
+ memcpy(&(packet->address), &address, sizeof(packet->address));
+
/*
* Return decoded data packet...
*/
+ DEBUG_puts("5_cupsSNMPRead: Returning packet");
+
return (packet);
}
/*
- * 'cupsSNMPSetDebug()' - Enable/disable debug logging to stderr.
- *
- * @since CUPS 1.4@
+ * '_cupsSNMPSetDebug()' - Enable/disable debug logging to stderr.
*/
void
-cupsSNMPSetDebug(int level) /* I - 1 to enable debug output, 0 otherwise */
+_cupsSNMPSetDebug(int level) /* I - 1 to enable debug output, 0 otherwise */
{
_cups_globals_t *cg = _cupsGlobals(); /* Global data */
+ DEBUG_printf(("4_cupsSNMPSetDebug(level=%d)", level));
+
cg->snmp_debug = level;
}
/*
- * 'cupsSNMPWrite()' - Send an SNMP query packet.
+ * '_cupsSNMPStringToOID()' - Convert a numeric OID string to an OID array.
+ *
+ * This function converts a string of the form ".N.N.N.N.N" to the
+ * corresponding OID array terminated by -1.
+ *
+ * @code NULL@ is returned if the array is not large enough or the string is
+ * not a valid OID number.
+ */
+
+int * /* O - Pointer to OID array or @code NULL@ on error */
+_cupsSNMPStringToOID(const char *src, /* I - OID string */
+ int *dst, /* I - OID array */
+ int dstsize)/* I - Number of integers in OID array */
+{
+ int *dstptr, /* Pointer into OID array */
+ *dstend; /* End of OID array */
+
+
+ DEBUG_printf(("4_cupsSNMPStringToOID(src=\"%s\", dst=%p, dstsize=%d)",
+ src, dst, dstsize));
+
+ /*
+ * Range check input...
+ */
+
+ if (!src || !dst || dstsize < 2)
+ return (NULL);
+
+ /*
+ * Skip leading "."...
+ */
+
+ if (*src == '.')
+ src ++;
+
+ /*
+ * Loop to the end of the string...
+ */
+
+ for (dstend = dst + dstsize - 1, dstptr = dst, *dstptr = 0;
+ *src && dstptr < dstend;
+ src ++)
+ {
+ if (*src == '.')
+ {
+ dstptr ++;
+ *dstptr = 0;
+ }
+ else if (isdigit(*src & 255))
+ *dstptr = *dstptr * 10 + *src - '0';
+ else
+ break;
+ }
+
+ if (*src)
+ return (NULL);
+
+ /*
+ * Terminate the end of the OID array and return...
+ */
+
+ dstptr[1] = -1;
+
+ return (dst);
+}
+
+
+/*
+ * '_cupsSNMPWalk()' - Enumerate a group of OIDs.
+ *
+ * This function queries all of the OIDs with the specified OID prefix,
+ * calling the "cb" function for every response that is received.
*
- * The array pointed to by "oid" is 0-terminated.
+ * The array pointed to by "prefix" is terminated by the value -1.
*
- * @since CUPS 1.4@
+ * If "timeout" is negative, @code _cupsSNMPWalk@ will wait for a response
+ * indefinitely.
+ */
+
+int /* O - Number of OIDs found or -1 on error */
+_cupsSNMPWalk(int fd, /* I - SNMP socket */
+ http_addr_t *address, /* I - Address to query */
+ int version, /* I - SNMP version */
+ const char *community,/* I - Community name */
+ const int *prefix, /* I - OID prefix */
+ double timeout, /* I - Timeout for each response in seconds */
+ cups_snmp_cb_t cb, /* I - Function to call for each response */
+ void *data) /* I - User data pointer that is passed to the callback function */
+{
+ int count = 0; /* Number of OIDs found */
+ int request_id = 0; /* Current request ID */
+ cups_snmp_t packet; /* Current response packet */
+ int lastoid[CUPS_SNMP_MAX_OID];
+ /* Last OID we got */
+
+
+ /*
+ * Range check input...
+ */
+
+ DEBUG_printf(("4_cupsSNMPWalk(fd=%d, address=%p, version=%d, "
+ "community=\"%s\", prefix=%p, timeout=%.1f, cb=%p, data=%p)",
+ fd, address, version, community, prefix, timeout, cb, data));
+
+ if (fd < 0 || !address || version != CUPS_SNMP_VERSION_1 || !community ||
+ !prefix || !cb)
+ {
+ DEBUG_puts("5_cupsSNMPWalk: Returning -1");
+
+ return (-1);
+ }
+
+ /*
+ * Copy the OID prefix and then loop until we have no more OIDs...
+ */
+
+ _cupsSNMPCopyOID(packet.object_name, prefix, CUPS_SNMP_MAX_OID);
+ lastoid[0] = -1;
+
+ for (;;)
+ {
+ request_id ++;
+
+ if (!_cupsSNMPWrite(fd, address, version, community,
+ CUPS_ASN1_GET_NEXT_REQUEST, request_id,
+ packet.object_name))
+ {
+ DEBUG_puts("5_cupsSNMPWalk: Returning -1");
+
+ return (-1);
+ }
+
+ if (!_cupsSNMPRead(fd, &packet, timeout))
+ {
+ DEBUG_puts("5_cupsSNMPWalk: Returning -1");
+
+ return (-1);
+ }
+
+ if (!_cupsSNMPIsOIDPrefixed(&packet, prefix) ||
+ _cupsSNMPIsOID(&packet, lastoid))
+ {
+ DEBUG_printf(("5_cupsSNMPWalk: Returning %d", count));
+
+ return (count);
+ }
+
+ if (packet.error || packet.error_status)
+ {
+ DEBUG_printf(("5_cupsSNMPWalk: Returning %d", count > 0 ? count : -1));
+
+ return (count > 0 ? count : -1);
+ }
+
+ _cupsSNMPCopyOID(lastoid, packet.object_name, CUPS_SNMP_MAX_OID);
+
+ count ++;
+
+ (*cb)(&packet, data);
+ }
+}
+
+
+/*
+ * '_cupsSNMPWrite()' - Send an SNMP query packet.
+ *
+ * The array pointed to by "oid" is terminated by the value -1.
*/
int /* O - 1 on success, 0 on error */
-cupsSNMPWrite(
+_cupsSNMPWrite(
int fd, /* I - SNMP socket */
http_addr_t *address, /* I - Address to send to */
int version, /* I - SNMP version */
unsigned char buffer[CUPS_SNMP_MAX_PACKET];
/* SNMP message buffer */
int bytes; /* Size of message */
+ http_addr_t temp; /* Copy of address */
+ /*
+ * Range check input...
+ */
+
+ DEBUG_printf(("4_cupsSNMPWrite(fd=%d, address=%p, version=%d, "
+ "community=\"%s\", request_type=%d, request_id=%u, oid=%p)",
+ fd, address, version, community, request_type, request_id, oid));
+
+ if (fd < 0 || !address || version != CUPS_SNMP_VERSION_1 || !community ||
+ (request_type != CUPS_ASN1_GET_REQUEST &&
+ request_type != CUPS_ASN1_GET_NEXT_REQUEST) || request_id < 1 || !oid)
+ {
+ DEBUG_puts("5_cupsSNMPWrite: Returning 0 (bad arguments)");
+
+ return (0);
+ }
+
/*
* Create the SNMP message...
*/
packet.request_type = request_type;
packet.request_id = request_id;
packet.object_type = CUPS_ASN1_NULL_VALUE;
-
+
strlcpy(packet.community, community, sizeof(packet.community));
- for (i = 0; oid[i]; i ++)
+ for (i = 0; oid[i] >= 0 && i < (CUPS_SNMP_MAX_OID - 1); i ++)
packet.object_name[i] = oid[i];
+ packet.object_name[i] = -1;
+
+ if (oid[i] >= 0)
+ {
+ DEBUG_puts("5_cupsSNMPWrite: Returning 0 (OID too big)");
+
+ errno = E2BIG;
+ return (0);
+ }
bytes = asn1_encode_snmp(buffer, sizeof(buffer), &packet);
if (bytes < 0)
{
- errno = E2BIG;
+ DEBUG_puts("5_cupsSNMPWrite: Returning 0 (request too big)");
+ errno = E2BIG;
return (0);
}
* Send the message...
*/
-#ifdef AF_INET6
- if (address->addr.sa_family == AF_INET6)
- address->ipv6.sin6_port = htons(CUPS_SNMP_PORT);
- else
-#endif /* AF_INET6 */
- address->ipv4.sin_port = htons(CUPS_SNMP_PORT);
+ temp = *address;
- return (sendto(fd, buffer, bytes, 0, (void *)address,
- httpAddrLength(address)) == bytes);
+ _httpAddrSetPort(&temp, CUPS_SNMP_PORT);
+
+ return (sendto(fd, buffer, bytes, 0, (void *)&temp,
+ httpAddrLength(&temp)) == bytes);
+}
+
+
+/*
+ * 'asn1_debug()' - Decode an ASN1-encoded message.
+ */
+
+static void
+asn1_debug(const char *prefix, /* I - Prefix string */
+ unsigned char *buffer, /* I - Buffer */
+ size_t len, /* I - Length of buffer */
+ int indent) /* I - Indentation */
+{
+ int i; /* Looping var */
+ unsigned char *bufend; /* End of buffer */
+ int integer; /* Number value */
+ int oid[CUPS_SNMP_MAX_OID]; /* OID value */
+ char string[CUPS_SNMP_MAX_STRING];
+ /* String value */
+ unsigned char value_type; /* Type of value */
+ int value_length; /* Length of value */
+ _cups_globals_t *cg = _cupsGlobals(); /* Global data */
+
+
+ if (cg->snmp_debug <= 0)
+ return;
+
+ if (cg->snmp_debug > 1 && indent == 0)
+ {
+ /*
+ * Do a hex dump of the packet...
+ */
+
+ int j;
+
+ fprintf(stderr, "%sHex Dump (%d bytes):\n", prefix, (int)len);
+
+ for (i = 0; i < (int)len; i += 16)
+ {
+ fprintf(stderr, "%s%04x:", prefix, i);
+
+ for (j = 0; j < 16 && (i + j) < (int)len; j ++)
+ {
+ if (j && !(j & 3))
+ fprintf(stderr, " %02x", buffer[i + j]);
+ else
+ fprintf(stderr, " %02x", buffer[i + j]);
+ }
+
+ while (j < 16)
+ {
+ if (j && !(j & 3))
+ fputs(" ", stderr);
+ else
+ fputs(" ", stderr);
+
+ j ++;
+ }
+
+ fputs(" ", stderr);
+
+ for (j = 0; j < 16 && (i + j) < (int)len; j ++)
+ if (buffer[i + j] < ' ' || buffer[i + j] >= 0x7f)
+ putc('.', stderr);
+ else
+ putc(buffer[i + j], stderr);
+
+ putc('\n', stderr);
+ }
+ }
+
+ if (indent == 0)
+ fprintf(stderr, "%sMessage:\n", prefix);
+
+ bufend = buffer + len;
+
+ while (buffer < bufend)
+ {
+ /*
+ * Get value type...
+ */
+
+ value_type = asn1_get_type(&buffer, bufend);
+ value_length = asn1_get_length(&buffer, bufend);
+
+ switch (value_type)
+ {
+ case CUPS_ASN1_BOOLEAN :
+ integer = asn1_get_integer(&buffer, bufend, value_length);
+
+ fprintf(stderr, "%s%*sBOOLEAN %d bytes %d\n", prefix, indent, "",
+ value_length, integer);
+ break;
+
+ case CUPS_ASN1_INTEGER :
+ integer = asn1_get_integer(&buffer, bufend, value_length);
+
+ fprintf(stderr, "%s%*sINTEGER %d bytes %d\n", prefix, indent, "",
+ value_length, integer);
+ break;
+
+ case CUPS_ASN1_COUNTER :
+ integer = asn1_get_integer(&buffer, bufend, value_length);
+
+ fprintf(stderr, "%s%*sCOUNTER %d bytes %u\n", prefix, indent, "",
+ value_length, (unsigned)integer);
+ break;
+
+ case CUPS_ASN1_GAUGE :
+ integer = asn1_get_integer(&buffer, bufend, value_length);
+
+ fprintf(stderr, "%s%*sGAUGE %d bytes %u\n", prefix, indent, "",
+ value_length, (unsigned)integer);
+ break;
+
+ case CUPS_ASN1_TIMETICKS :
+ integer = asn1_get_integer(&buffer, bufend, value_length);
+
+ fprintf(stderr, "%s%*sTIMETICKS %d bytes %u\n", prefix, indent, "",
+ value_length, (unsigned)integer);
+ break;
+
+ case CUPS_ASN1_OCTET_STRING :
+ fprintf(stderr, "%s%*sOCTET STRING %d bytes \"%s\"\n", prefix,
+ indent, "", value_length,
+ asn1_get_string(&buffer, bufend, value_length, string,
+ sizeof(string)));
+ break;
+
+ case CUPS_ASN1_HEX_STRING :
+ asn1_get_string(&buffer, bufend, value_length, string,
+ sizeof(string));
+ fprintf(stderr, "%s%*sHex-STRING %d bytes", prefix,
+ indent, "", value_length);
+ for (i = 0; i < value_length; i ++)
+ fprintf(stderr, " %02X", string[i] & 255);
+ putc('\n', stderr);
+ break;
+
+ case CUPS_ASN1_NULL_VALUE :
+ fprintf(stderr, "%s%*sNULL VALUE %d bytes\n", prefix, indent, "",
+ value_length);
+
+ buffer += value_length;
+ break;
+
+ case CUPS_ASN1_OID :
+ integer = asn1_get_oid(&buffer, bufend, value_length, oid,
+ CUPS_SNMP_MAX_OID);
+
+ fprintf(stderr, "%s%*sOID %d bytes ", prefix, indent, "",
+ value_length);
+ for (i = 0; i < integer; i ++)
+ fprintf(stderr, ".%d", oid[i]);
+ putc('\n', stderr);
+ break;
+
+ case CUPS_ASN1_SEQUENCE :
+ fprintf(stderr, "%s%*sSEQUENCE %d bytes\n", prefix, indent, "",
+ value_length);
+ asn1_debug(prefix, buffer, value_length, indent + 4);
+
+ buffer += value_length;
+ break;
+
+ case CUPS_ASN1_GET_NEXT_REQUEST :
+ fprintf(stderr, "%s%*sGet-Next-Request-PDU %d bytes\n", prefix,
+ indent, "", value_length);
+ asn1_debug(prefix, buffer, value_length, indent + 4);
+
+ buffer += value_length;
+ break;
+
+ case CUPS_ASN1_GET_REQUEST :
+ fprintf(stderr, "%s%*sGet-Request-PDU %d bytes\n", prefix, indent, "",
+ value_length);
+ asn1_debug(prefix, buffer, value_length, indent + 4);
+
+ buffer += value_length;
+ break;
+
+ case CUPS_ASN1_GET_RESPONSE :
+ fprintf(stderr, "%s%*sGet-Response-PDU %d bytes\n", prefix, indent,
+ "", value_length);
+ asn1_debug(prefix, buffer, value_length, indent + 4);
+
+ buffer += value_length;
+ break;
+
+ default :
+ fprintf(stderr, "%s%*sUNKNOWN(%x) %d bytes\n", prefix, indent, "",
+ value_type, value_length);
+
+ buffer += value_length;
+ break;
+ }
+ }
}
*/
memset(packet, 0, sizeof(cups_snmp_t));
+ packet->object_name[0] = -1;
bufptr = buffer;
bufend = buffer + len;
break;
case CUPS_ASN1_OCTET_STRING :
+ case CUPS_ASN1_BIT_STRING :
+ case CUPS_ASN1_HEX_STRING :
+ packet->object_value.string.num_bytes = length;
asn1_get_string(&bufptr, bufend, length,
- packet->object_value.string,
- CUPS_SNMP_MAX_STRING);
+ (char *)packet->object_value.string.bytes,
+ sizeof(packet->object_value.string.bytes));
break;
case CUPS_ASN1_OID :
asn1_get_integer(&bufptr, bufend, length);
break;
+ case CUPS_ASN1_TIMETICKS :
+ packet->object_value.timeticks =
+ asn1_get_integer(&bufptr, bufend, length);
+ break;
+
default :
snmp_set_error(packet, _("Unsupported value type"));
break;
}
-/*
- * 'asn1_debug()' - Decode an ASN1-encoded message.
- */
-
-static void
-asn1_debug(const char *prefix, /* I - Prefix string */
- unsigned char *buffer, /* I - Buffer */
- size_t len, /* I - Length of buffer */
- int indent) /* I - Indentation */
-{
- int i; /* Looping var */
- unsigned char *bufend; /* End of buffer */
- int integer; /* Number value */
- int oid[CUPS_SNMP_MAX_OID]; /* OID value */
- char string[CUPS_SNMP_MAX_STRING];
- /* String value */
- unsigned char value_type; /* Type of value */
- int value_length; /* Length of value */
- _cups_globals_t *cg = _cupsGlobals(); /* Global data */
-
-
- if (cg->snmp_debug <= 0)
- return;
-
- bufend = buffer + len;
-
- while (buffer < bufend)
- {
- /*
- * Get value type...
- */
-
- value_type = asn1_get_type(&buffer, bufend);
- value_length = asn1_get_length(&buffer, bufend);
-
- switch (value_type)
- {
- case CUPS_ASN1_BOOLEAN :
- integer = asn1_get_integer(&buffer, bufend, value_length);
-
- fprintf(stderr, "%s%*sBOOLEAN %d bytes %d\n", prefix, indent, "",
- value_length, integer);
- break;
-
- case CUPS_ASN1_INTEGER :
- integer = asn1_get_integer(&buffer, bufend, value_length);
-
- fprintf(stderr, "%s%*sINTEGER %d bytes %d\n", prefix, indent, "",
- value_length, integer);
- break;
-
- case CUPS_ASN1_OCTET_STRING :
- fprintf(stderr, "%s%*sOCTET STRING %d bytes \"%s\"\n", prefix,
- indent, "", value_length,
- asn1_get_string(&buffer, bufend, value_length, string,
- sizeof(string)));
- break;
-
- case CUPS_ASN1_NULL_VALUE :
- fprintf(stderr, "%s%*sNULL VALUE %d bytes\n", prefix, indent, "",
- value_length);
-
- buffer += value_length;
- break;
-
- case CUPS_ASN1_OID :
- asn1_get_oid(&buffer, bufend, value_length, oid, CUPS_SNMP_MAX_OID);
-
- fprintf(stderr, "%s%*sOID %d bytes ", prefix, indent, "",
- value_length);
- for (i = 0; oid[i]; i ++)
- fprintf(stderr, ".%d", oid[i]);
- putc('\n', stderr);
- break;
-
- case CUPS_ASN1_SEQUENCE :
- fprintf(stderr, "%s%*sSEQUENCE %d bytes\n", prefix, indent, "",
- value_length);
- asn1_debug(prefix, buffer, value_length, indent + 4);
-
- buffer += value_length;
- break;
-
- case CUPS_ASN1_GET_REQUEST :
- fprintf(stderr, "%s%*sGet-Request-PDU %d bytes\n", prefix, indent, "",
- value_length);
- asn1_debug(prefix, buffer, value_length, indent + 4);
-
- buffer += value_length;
- break;
-
- case CUPS_ASN1_GET_RESPONSE :
- fprintf(stderr, "%s%*sGet-Response-PDU %d bytes\n", prefix, indent,
- "", value_length);
- asn1_debug(prefix, buffer, value_length, indent + 4);
-
- buffer += value_length;
- break;
-
- default :
- fprintf(stderr, "%s%*sUNKNOWN(%x) %d bytes\n", prefix, indent, "",
- value_type, value_length);
-
- buffer += value_length;
- break;
- }
- }
-}
-
-
/*
* 'asn1_encode_snmp()' - Encode a SNMP packet.
*/
* Get the lengths of the community string, OID, and message...
*/
+
namelen = asn1_size_oid(packet->object_name);
switch (packet->object_type)
break;
case CUPS_ASN1_OCTET_STRING :
- valuelen = strlen(packet->object_value.string);
+ valuelen = packet->object_value.string.num_bytes;
break;
case CUPS_ASN1_OID :
1 + asn1_size_length(reqlen) + reqlen;
total = 1 + asn1_size_length(msglen) + msglen;
- if (total > bufsize)
+ if (total > (int)bufsize)
{
packet->error = "Message too large for buffer";
return (-1);
memcpy(bufptr, packet->community, commlen);
bufptr += commlen;
- *bufptr++ = packet->request_type; /* Get-Request-PDU */
+ *bufptr++ = packet->request_type; /* Get-Request-PDU/Get-Next-Request-PDU */
asn1_set_length(&bufptr, reqlen);
asn1_set_integer(&bufptr, packet->request_id);
case CUPS_ASN1_OCTET_STRING :
*bufptr++ = CUPS_ASN1_OCTET_STRING;
asn1_set_length(&bufptr, valuelen);
- memcpy(bufptr, packet->object_value.string, valuelen);
+ memcpy(bufptr, packet->object_value.string.bytes, valuelen);
bufptr += valuelen;
break;
int value; /* Integer value */
- for (value = 0;
+ if (length > sizeof(int))
+ {
+ (*buffer) += length;
+ return (0);
+ }
+
+ for (value = (**buffer & 0x80) ? -1 : 0;
length > 0 && *buffer < bufend;
length --, (*buffer) ++)
value = (value << 8) | **buffer;
* 'asn1_get_length()' - Get a value length.
*/
-static int /* O - Length */
+static unsigned /* O - Length */
asn1_get_length(unsigned char **buffer, /* IO - Pointer in buffer */
unsigned char *bufend) /* I - End of buffer */
{
- int length; /* Length */
+ unsigned length; /* Length */
length = **buffer;
(*buffer) ++;
if (length & 128)
- length = asn1_get_integer(buffer, bufend, length & 127);
+ {
+ int count; /* Number of bytes for length */
+
+
+ if ((count = length & 127) > sizeof(unsigned))
+ {
+ (*buffer) += count;
+ return (0);
+ }
+
+ for (length = 0;
+ count > 0 && *buffer < bufend;
+ count --, (*buffer) ++)
+ length = (length << 8) | **buffer;
+ }
return (length);
}
* 'asn1_get_oid()' - Get an OID value.
*/
-static int /* O - Last OID number */
+static int /* O - Number of OIDs */
asn1_get_oid(
unsigned char **buffer, /* IO - Pointer in buffer */
unsigned char *bufend, /* I - End of buffer */
int oidsize) /* I - Size of OID buffer */
{
unsigned char *valend; /* End of value */
- int *oidend; /* End of OID buffer */
+ int *oidptr, /* Current OID */
+ *oidend; /* End of OID buffer */
int number; /* OID number */
valend = *buffer + length;
+ oidptr = oid;
oidend = oid + oidsize - 1;
if (valend > bufend)
if (number < 80)
{
- *oid++ = number / 40;
- number = number % 40;
- *oid++ = number;
+ *oidptr++ = number / 40;
+ number = number % 40;
+ *oidptr++ = number;
}
else
{
- *oid++ = 2;
- number -= 80;
- *oid++ = number;
+ *oidptr++ = 2;
+ number -= 80;
+ *oidptr++ = number;
}
while (*buffer < valend)
{
number = asn1_get_packed(buffer, bufend);
- if (oid < oidend)
- *oid++ = number;
+ if (oidptr < oidend)
+ *oidptr++ = number;
}
- *oid = 0;
+ *oidptr = -1;
- return (number);
+ return (oidptr - oid);
}
char *string, /* I - String buffer */
int strsize) /* I - String buffer size */
{
+ if (length > (bufend - *buffer))
+ length = bufend - *buffer;
+
if (length < 0)
{
/*
static void
asn1_set_length(unsigned char **buffer, /* IO - Pointer in buffer */
- int length) /* I - Length value */
+ unsigned length) /* I - Length value */
{
if (length > 255)
{
asn1_set_length(buffer, asn1_size_oid(oid));
+ if (oid[1] < 0)
+ {
+ asn1_set_packed(buffer, oid[0] * 40);
+ return;
+ }
+
asn1_set_packed(buffer, oid[0] * 40 + oid[1]);
- for (oid += 2; *oid; oid ++)
+ for (oid += 2; *oid >= 0; oid ++)
asn1_set_packed(buffer, *oid);
}
{
if (integer > 0xfffffff)
{
- **buffer = (integer >> 28) & 0x7f;
+ **buffer = ((integer >> 28) & 0x7f) | 0x80;
(*buffer) ++;
}
if (integer > 0x1fffff)
{
- **buffer = (integer >> 21) & 0x7f;
+ **buffer = ((integer >> 21) & 0x7f) | 0x80;
(*buffer) ++;
}
if (integer > 0x3fff)
{
- **buffer = (integer >> 14) & 0x7f;
+ **buffer = ((integer >> 14) & 0x7f) | 0x80;
(*buffer) ++;
}
if (integer > 0x7f)
{
- **buffer = (integer >> 7) & 0x7f;
+ **buffer = ((integer >> 7) & 0x7f) | 0x80;
(*buffer) ++;
}
int length; /* Length of value */
- for (length = asn1_size_packed(oid[0] * 40 + oid[1]), oid += 2; *oid; oid ++)
+ if (oid[1] < 0)
+ return (asn1_size_packed(oid[0] * 40));
+
+ for (length = asn1_size_packed(oid[0] * 40 + oid[1]), oid += 2;
+ *oid >= 0;
+ oid ++)
length += asn1_size_packed(*oid);
return (length);
projects / thirdparty / cups.git / blobdiff